I truly love this one, as the subject line says it has no extra additives. It only consists of the mineral itself. So I don't have to deal with all the additives that usually follows tablets. They often don't agree with my stomach, as I am sensible to a lot of stuff.
30 drops a day, and it should last a month.
So if the manufacturer doesn't lie and this liquid really consists the amount of zink sulfate stated, I would conclude ending this review saying that I absolutely recommend this.
Five stars

I've been using this zinc product for over a year and have had noticeable results. I have cadmium poising. Cadmium displaces zinc. I take this product to replace the zinc that was displaced by the cadmium after an EDTA treatment which is supposed to remove the cadmium from the body. Don't ask me how I got so much cadmium in my body because I don't know the answer.
Also I want to add this product contains NO FULVIC ACID! Fulvic acid contains heavy metals and cadmium is one of them.